214518689666 has 8 divisors (see below), whose sum is σ = 321780089484. Its totient is φ = 107258659840.

The previous prime is 214518689647. The next prime is 214518689681. The reversal of 214518689666 is 666986815412.

It can be written as a sum of positive squares in 2 ways, for example, as 132948473641 + 81570216025 = 364621^2 + 285605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 214518689599 and 214518689608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263186 + ... + 705906.

Almost surely, 2^214518689666 is an apocalyptic number.

214518689666 is a deficient number, since it is larger than the sum of its proper divisors (107261399818).

214518689666 is a wasteful number, since it uses less digits than its factorization.

214518689666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684996.

The product of its digits is 29859840, while the sum is 62.

The spelling of 214518689666 in words is "two hundred fourteen billion, five hundred eighteen million, six hundred eighty-nine thousand, six hundred sixty-six".